The two endpoints of a segment are at $(1,4)$ and $(1,10)$. What is the sum of the coordinates of the midpoint of the segment?

Midpoint  =

[  ( 1 + 1)/2 , (4 + 10) / 2  ]  =  [ 2/2, 14/2 ] =   (1 , 7)     

You should be able to  finish this....